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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "src/platform/mutex.h" | |
| 6 | |
| 7 #include <errno.h> | |
| 8 | |
| 9 namespace v8 { | |
| 10 namespace internal { | |
| 11 | |
| 12 #if V8_OS_POSIX | |
| 13 | |
| 14 static V8_INLINE void InitializeNativeHandle(pthread_mutex_t* mutex) { | |
| 15 int result; | |
| 16 #if defined(DEBUG) | |
| 17 // Use an error checking mutex in debug mode. | |
| 18 pthread_mutexattr_t attr; | |
| 19 result = pthread_mutexattr_init(&attr); | |
| 20 ASSERT_EQ(0, result); | |
| 21 result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK); | |
| 22 ASSERT_EQ(0, result); | |
| 23 result = pthread_mutex_init(mutex, &attr); | |
| 24 ASSERT_EQ(0, result); | |
| 25 result = pthread_mutexattr_destroy(&attr); | |
| 26 #else | |
| 27 // Use a fast mutex (default attributes). | |
| 28 result = pthread_mutex_init(mutex, NULL); | |
| 29 #endif // defined(DEBUG) | |
| 30 ASSERT_EQ(0, result); | |
| 31 USE(result); | |
| 32 } | |
| 33 | |
| 34 | |
| 35 static V8_INLINE void InitializeRecursiveNativeHandle(pthread_mutex_t* mutex) { | |
| 36 pthread_mutexattr_t attr; | |
| 37 int result = pthread_mutexattr_init(&attr); | |
| 38 ASSERT_EQ(0, result); | |
| 39 result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); | |
| 40 ASSERT_EQ(0, result); | |
| 41 result = pthread_mutex_init(mutex, &attr); | |
| 42 ASSERT_EQ(0, result); | |
| 43 result = pthread_mutexattr_destroy(&attr); | |
| 44 ASSERT_EQ(0, result); | |
| 45 USE(result); | |
| 46 } | |
| 47 | |
| 48 | |
| 49 static V8_INLINE void DestroyNativeHandle(pthread_mutex_t* mutex) { | |
| 50 int result = pthread_mutex_destroy(mutex); | |
| 51 ASSERT_EQ(0, result); | |
| 52 USE(result); | |
| 53 } | |
| 54 | |
| 55 | |
| 56 static V8_INLINE void LockNativeHandle(pthread_mutex_t* mutex) { | |
| 57 int result = pthread_mutex_lock(mutex); | |
| 58 ASSERT_EQ(0, result); | |
| 59 USE(result); | |
| 60 } | |
| 61 | |
| 62 | |
| 63 static V8_INLINE void UnlockNativeHandle(pthread_mutex_t* mutex) { | |
| 64 int result = pthread_mutex_unlock(mutex); | |
| 65 ASSERT_EQ(0, result); | |
| 66 USE(result); | |
| 67 } | |
| 68 | |
| 69 | |
| 70 static V8_INLINE bool TryLockNativeHandle(pthread_mutex_t* mutex) { | |
| 71 int result = pthread_mutex_trylock(mutex); | |
| 72 if (result == EBUSY) { | |
| 73 return false; | |
| 74 } | |
| 75 ASSERT_EQ(0, result); | |
| 76 return true; | |
| 77 } | |
| 78 | |
| 79 #elif V8_OS_WIN | |
| 80 | |
| 81 static V8_INLINE void InitializeNativeHandle(PCRITICAL_SECTION cs) { | |
| 82 InitializeCriticalSection(cs); | |
| 83 } | |
| 84 | |
| 85 | |
| 86 static V8_INLINE void InitializeRecursiveNativeHandle(PCRITICAL_SECTION cs) { | |
| 87 InitializeCriticalSection(cs); | |
| 88 } | |
| 89 | |
| 90 | |
| 91 static V8_INLINE void DestroyNativeHandle(PCRITICAL_SECTION cs) { | |
| 92 DeleteCriticalSection(cs); | |
| 93 } | |
| 94 | |
| 95 | |
| 96 static V8_INLINE void LockNativeHandle(PCRITICAL_SECTION cs) { | |
| 97 EnterCriticalSection(cs); | |
| 98 } | |
| 99 | |
| 100 | |
| 101 static V8_INLINE void UnlockNativeHandle(PCRITICAL_SECTION cs) { | |
| 102 LeaveCriticalSection(cs); | |
| 103 } | |
| 104 | |
| 105 | |
| 106 static V8_INLINE bool TryLockNativeHandle(PCRITICAL_SECTION cs) { | |
| 107 return TryEnterCriticalSection(cs); | |
| 108 } | |
| 109 | |
| 110 #endif // V8_OS_POSIX | |
| 111 | |
| 112 | |
| 113 Mutex::Mutex() { | |
| 114 InitializeNativeHandle(&native_handle_); | |
| 115 #ifdef DEBUG | |
| 116 level_ = 0; | |
| 117 #endif | |
| 118 } | |
| 119 | |
| 120 | |
| 121 Mutex::~Mutex() { | |
| 122 DestroyNativeHandle(&native_handle_); | |
| 123 ASSERT_EQ(0, level_); | |
| 124 } | |
| 125 | |
| 126 | |
| 127 void Mutex::Lock() { | |
| 128 LockNativeHandle(&native_handle_); | |
| 129 AssertUnheldAndMark(); | |
| 130 } | |
| 131 | |
| 132 | |
| 133 void Mutex::Unlock() { | |
| 134 AssertHeldAndUnmark(); | |
| 135 UnlockNativeHandle(&native_handle_); | |
| 136 } | |
| 137 | |
| 138 | |
| 139 bool Mutex::TryLock() { | |
| 140 if (!TryLockNativeHandle(&native_handle_)) { | |
| 141 return false; | |
| 142 } | |
| 143 AssertUnheldAndMark(); | |
| 144 return true; | |
| 145 } | |
| 146 | |
| 147 | |
| 148 RecursiveMutex::RecursiveMutex() { | |
| 149 InitializeRecursiveNativeHandle(&native_handle_); | |
| 150 #ifdef DEBUG | |
| 151 level_ = 0; | |
| 152 #endif | |
| 153 } | |
| 154 | |
| 155 | |
| 156 RecursiveMutex::~RecursiveMutex() { | |
| 157 DestroyNativeHandle(&native_handle_); | |
| 158 ASSERT_EQ(0, level_); | |
| 159 } | |
| 160 | |
| 161 | |
| 162 void RecursiveMutex::Lock() { | |
| 163 LockNativeHandle(&native_handle_); | |
| 164 #ifdef DEBUG | |
| 165 ASSERT_LE(0, level_); | |
| 166 level_++; | |
| 167 #endif | |
| 168 } | |
| 169 | |
| 170 | |
| 171 void RecursiveMutex::Unlock() { | |
| 172 #ifdef DEBUG | |
| 173 ASSERT_LT(0, level_); | |
| 174 level_--; | |
| 175 #endif | |
| 176 UnlockNativeHandle(&native_handle_); | |
| 177 } | |
| 178 | |
| 179 | |
| 180 bool RecursiveMutex::TryLock() { | |
| 181 if (!TryLockNativeHandle(&native_handle_)) { | |
| 182 return false; | |
| 183 } | |
| 184 #ifdef DEBUG | |
| 185 ASSERT_LE(0, level_); | |
| 186 level_++; | |
| 187 #endif | |
| 188 return true; | |
| 189 } | |
| 190 | |
| 191 } } // namespace v8::internal | |
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Chromium Code Reviews
Issue 358363002:
Move platform abstraction to base library (Closed)
Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge